The fire which started at 7:35 pm has now reached third alarm, according to a tweet of Metro Manila Development Authority (MMDA).

Photo Credit: QC Fire Department

The MMDA advised all vehicles to take the Shaw tunnel going northbound.

MMDA ALERT: Fire incident at EDSA Megamall NB involving Megamall under construction building as of 7:35 https://t.co/NuBDfd32R3 on 3rd alarm All vehicles please take Shaw tunnel for alternate route.MMDA and Local fire fighter on site. #mmda

Our team are currently responding to a fire incident at the Basement B of SM Megamall . PRC NHQ and Mandaluyong Chapter dispatched one fire truck and two ambulance units to the area. Fire status was raised to 3rd alarm at 8:05PM. Keep safe everyone. pic.twitter.com/1Ee78StODS